diff --git a/mediapipe/tasks/ios/test/text/text_classifier/MPPTextClassifierTests.m b/mediapipe/tasks/ios/test/text/text_classifier/MPPTextClassifierTests.m
index a80fb8824..be449ccb9 100644
--- a/mediapipe/tasks/ios/test/text/text_classifier/MPPTextClassifierTests.m
+++ b/mediapipe/tasks/ios/test/text/text_classifier/MPPTextClassifierTests.m
@@ -28,9 +28,7 @@ static NSString *const kExpectedErrorDomain = @"com.google.mediapipe.tasks";
   XCTAssertNotNil(error);                                                                     \
   XCTAssertEqualObjects(error.domain, expectedError.domain);                                  \
   XCTAssertEqual(error.code, expectedError.code);                                             \
-  XCTAssertNotEqual(                                                                          \
-      [error.localizedDescription rangeOfString:expectedError.localizedDescription].location, \
-      NSNotFound)
+  XCTAssertEqualObjects(error.localizedDescription, expectedError.localizedDescription)
 
 #define AssertEqualCategoryArrays(categories, expectedCategories)                         \
   XCTAssertEqual(categories.count, expectedCategories.count);                             \
diff --git a/mediapipe/tasks/ios/test/text/text_embedder/MPPTextEmbedderTests.m b/mediapipe/tasks/ios/test/text/text_embedder/MPPTextEmbedderTests.m
index b32bb076c..aee2d9e2d 100644
--- a/mediapipe/tasks/ios/test/text/text_embedder/MPPTextEmbedderTests.m
+++ b/mediapipe/tasks/ios/test/text/text_embedder/MPPTextEmbedderTests.m
@@ -29,9 +29,7 @@ static const float kSimilarityDiffTolerance = 1e-4;
   XCTAssertNotNil(error);                                                                     \
   XCTAssertEqualObjects(error.domain, expectedError.domain);                                  \
   XCTAssertEqual(error.code, expectedError.code);                                             \
-  XCTAssertNotEqual(                                                                          \
-      [error.localizedDescription rangeOfString:expectedError.localizedDescription].location, \
-      NSNotFound)
+  XCTAssertEqualObjects(error.localizedDescription, expectedError.localizedDescription)
 
 #define AssertTextEmbedderResultHasOneEmbedding(textEmbedderResult) \
   XCTAssertNotNil(textEmbedderResult);                              \
diff --git a/mediapipe/tasks/ios/test/vision/image_classifier/MPPImageClassifierTests.m b/mediapipe/tasks/ios/test/vision/image_classifier/MPPImageClassifierTests.m
index 8db71a11b..332a217ca 100644
--- a/mediapipe/tasks/ios/test/vision/image_classifier/MPPImageClassifierTests.m
+++ b/mediapipe/tasks/ios/test/vision/image_classifier/MPPImageClassifierTests.m
@@ -34,9 +34,7 @@ static NSString *const kLiveStreamTestsDictExpectationKey = @"expectation";
   XCTAssertNotNil(error);                                                                     \
   XCTAssertEqualObjects(error.domain, expectedError.domain);                                  \
   XCTAssertEqual(error.code, expectedError.code);                                             \
-  XCTAssertNotEqual(                                                                          \
-      [error.localizedDescription rangeOfString:expectedError.localizedDescription].location, \
-      NSNotFound)
+  XCTAssertEqualObjects(error.localizedDescription, expectedError.localizedDescription)
 
 #define AssertEqualCategoryArrays(categories, expectedCategories)                         \
   XCTAssertEqual(categories.count, expectedCategories.count);                             \
diff --git a/mediapipe/tasks/ios/test/vision/object_detector/MPPObjectDetectorTests.m b/mediapipe/tasks/ios/test/vision/object_detector/MPPObjectDetectorTests.m
index 164159ed6..1b717ba48 100644
--- a/mediapipe/tasks/ios/test/vision/object_detector/MPPObjectDetectorTests.m
+++ b/mediapipe/tasks/ios/test/vision/object_detector/MPPObjectDetectorTests.m
@@ -32,9 +32,7 @@ static NSString *const kLiveStreamTestsDictExpectationKey = @"expectation";
   XCTAssertNotNil(error);                                                                     \
   XCTAssertEqualObjects(error.domain, expectedError.domain);                                  \
   XCTAssertEqual(error.code, expectedError.code);                                             \
-  XCTAssertNotEqual(                                                                          \
-      [error.localizedDescription rangeOfString:expectedError.localizedDescription].location, \
-      NSNotFound)
+  XCTAssertEqualObjects(error.localizedDescription, expectedError.localizedDescription)
 
 #define AssertEqualCategories(category, expectedCategory, detectionIndex, categoryIndex)           \
   XCTAssertEqual(category.index, expectedCategory.index,                                           \
diff --git a/mediapipe/tasks/ios/vision/image_classifier/utils/sources/MPPImageClassifierResult+Helpers.mm b/mediapipe/tasks/ios/vision/image_classifier/utils/sources/MPPImageClassifierResult+Helpers.mm
index 61ae785d1..7874b29c9 100644
--- a/mediapipe/tasks/ios/vision/image_classifier/utils/sources/MPPImageClassifierResult+Helpers.mm
+++ b/mediapipe/tasks/ios/vision/image_classifier/utils/sources/MPPImageClassifierResult+Helpers.mm
@@ -17,7 +17,7 @@
 
 #include "mediapipe/tasks/cc/components/containers/proto/classifications.pb.h"
 
-static const int kMicroSecondsPerMilliSecond = 1000;
+static const int kMicrosecondsPerMillisecond = 1000;
 
 namespace {
 using ClassificationResultProto =
@@ -29,19 +29,26 @@ using ::mediapipe::Packet;
 
 + (nullable MPPImageClassifierResult *)imageClassifierResultWithClassificationsPacket:
     (const Packet &)packet {
-  MPPClassificationResult *classificationResult;
+  // Even if packet does not validate as the expected type, you can safely access the timestamp.
+  NSInteger timestampInMilliSeconds =
+      (NSInteger)(packet.Timestamp().Value() / kMicrosecondsPerMillisecond);
 
   if (!packet.ValidateAsType<ClassificationResultProto>().ok()) {
-    return nil;
+    // MPPClassificationResult's timestamp is populated from timestamp `ClassificationResultProto`'s
+    // timestamp_ms(). It is 0 since the packet can't be validated as a `ClassificationResultProto`.
+    return [[MPPImageClassifierResult alloc]
+        initWithClassificationResult:[[MPPClassificationResult alloc] initWithClassifications:@[]
+                                                                      timestampInMilliseconds:0]
+             timestampInMilliseconds:timestampInMilliSeconds];
   }
 
-  classificationResult = [MPPClassificationResult
+  MPPClassificationResult *classificationResult = [MPPClassificationResult
       classificationResultWithProto:packet.Get<ClassificationResultProto>()];
 
   return [[MPPImageClassifierResult alloc]
       initWithClassificationResult:classificationResult
            timestampInMilliseconds:(NSInteger)(packet.Timestamp().Value() /
-                                               kMicroSecondsPerMilliSecond)];
+                                               kMicrosecondsPerMillisecond)];
 }
 
 @end